Academic Journal
Προβολή σε EDS

Improvement of On-Site Sensor for Simultaneous Determination of Phosphate, Silicic Acid, Nitrate plus Nitrite in Seawater

Λεπτομέρειες βιβλιογραφικής εγγραφής
Τίτλος: Improvement of On-Site Sensor for Simultaneous Determination of Phosphate, Silicic Acid, Nitrate plus Nitrite in Seawater
Συγγραφείς: Mahmoud Fatehy Altahan, Mario Esposito, Eric P. Achterberg
Πηγή: Sensors, Vol 22, Iss 3479, p 3479 (2022)
Στοιχεία εκδότη: MDPI AG
Έτος έκδοσης: 2022
Συλλογή: Directory of Open Access Journals: DOAJ Articles
Θεματικοί όροι: Griess reagent, nutrients analysis, Kiel Fjord, posphomolybdenum blue method, silicomolybdenum blue method, vanadium chloride reduction, Chemical technology, TP1-1185
Περιγραφή: Accurate, on-site determinations of macronutrients (phosphate (PO 4 3− ), nitrate (NO 3 − ), and silicic acid (H 4 SiO 4 )) in seawater in real time are essential to obtain information on their distribution, flux, and role in marine biogeochemical cycles. The development of robust sensors for long-term on-site analysis of macronutrients in seawater is a great challenge. Here, we present improvements of a commercial automated sensor for nutrients (including PO 4 3− , H 4 SiO 4 , and NO 2 − plus NO 3 − ), suitable for a variety of aquatic environments. The sensor uses the phosphomolybdate blue method for PO 4 3− , the silicomolybdate blue method for H 4 SiO 4 and the Griess reagent method for NO 2 − , modified with vanadium chloride as reducing agent for the determination of NO 3 − . Here, we report the optimization of analytical conditions, including reaction time for PO 4 3− analysis, complexation time for H 4 SiO 4 analysis, and analyte to reagent ratio for NO 3 − analysis. The instrument showed wide linear ranges, from 0.2 to 100 μM PO 4 3− , between 0.2 and 100 μM H 4 SiO 4 , from 0.5 to 100 μM NO 3 − , and between 0.4 and 100 μM NO 2 − , with detection limits of 0.18 μM, 0.15 μM, 0.45 μM, and 0.35 μM for PO 4 3− , H 4 SiO 4 , NO 3 − , and NO 2 − , respectively. The analyzer showed good precision with a relative standard deviation of 8.9% for PO 4 3− , 4.8% for H 4 SiO 4 , and 7.4% for NO 2 − plus NO 3 − during routine analysis of certified reference materials (KANSO, Japan). The analyzer performed well in the field during a 46-day deployment on a pontoon in the Kiel Fjord (located in the southwestern Baltic Sea), with a water supply from a depth of 1 m. The system successfully collected 443, 440, and 409 on-site data points for PO 4 3− , Σ(NO 3 − + NO 2 − ), and H 4 SiO 4 , respectively. Time series data agreed well with data obtained from the analysis of discretely collected samples using standard reference laboratory procedures and showed clear correlations with key hydrographic parameters throughout the ...
Τύπος εγγράφου: article in journal/newspaper
Γλώσσα: English
Relation: https://www.mdpi.com/1424-8220/22/9/3479; https://doaj.org/toc/1424-8220; https://doaj.org/article/5f31276d9f5643ba8b9bc30b7477f84b
DOI: 10.3390/s22093479
Διαθεσιμότητα: https://doi.org/10.3390/s22093479
https://doaj.org/article/5f31276d9f5643ba8b9bc30b7477f84b
Αριθμός Καταχώρησης: edsbas.4AF45FEC
Βάση Δεδομένων: BASE
FullText Text:
  Availability: 0
CustomLinks:
  – Url: https://doi.org/10.3390/s22093479#
    Name: EDS - BASE (ns324271)
    Category: fullText
    Text: View record from BASE
Header DbId: edsbas
DbLabel: BASE
An: edsbas.4AF45FEC
RelevancyScore: 920
AccessLevel: 3
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 920.2763671875
IllustrationInfo
Items – Name: Title
  Label: Title
  Group: Ti
  Data: Improvement of On-Site Sensor for Simultaneous Determination of Phosphate, Silicic Acid, Nitrate plus Nitrite in Seawater
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Mahmoud+Fatehy+Altahan%22">Mahmoud Fatehy Altahan</searchLink><br /><searchLink fieldCode="AR" term="%22Mario+Esposito%22">Mario Esposito</searchLink><br /><searchLink fieldCode="AR" term="%22Eric+P%2E+Achterberg%22">Eric P. Achterberg</searchLink>
– Name: TitleSource
  Label: Source
  Group: Src
  Data: Sensors, Vol 22, Iss 3479, p 3479 (2022)
– Name: Publisher
  Label: Publisher Information
  Group: PubInfo
  Data: MDPI AG
– Name: DatePubCY
  Label: Publication Year
  Group: Date
  Data: 2022
– Name: Subset
  Label: Collection
  Group: HoldingsInfo
  Data: Directory of Open Access Journals: DOAJ Articles
– Name: Subject
  Label: Subject Terms
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Griess+reagent%22">Griess reagent</searchLink><br /><searchLink fieldCode="DE" term="%22nutrients+analysis%22">nutrients analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Kiel+Fjord%22">Kiel Fjord</searchLink><br /><searchLink fieldCode="DE" term="%22posphomolybdenum+blue+method%22">posphomolybdenum blue method</searchLink><br /><searchLink fieldCode="DE" term="%22silicomolybdenum+blue+method%22">silicomolybdenum blue method</searchLink><br /><searchLink fieldCode="DE" term="%22vanadium+chloride+reduction%22">vanadium chloride reduction</searchLink><br /><searchLink fieldCode="DE" term="%22Chemical+technology%22">Chemical technology</searchLink><br /><searchLink fieldCode="DE" term="%22TP1-1185%22">TP1-1185</searchLink>
– Name: Abstract
  Label: Description
  Group: Ab
  Data: Accurate, on-site determinations of macronutrients (phosphate (PO 4 3− ), nitrate (NO 3 − ), and silicic acid (H 4 SiO 4 )) in seawater in real time are essential to obtain information on their distribution, flux, and role in marine biogeochemical cycles. The development of robust sensors for long-term on-site analysis of macronutrients in seawater is a great challenge. Here, we present improvements of a commercial automated sensor for nutrients (including PO 4 3− , H 4 SiO 4 , and NO 2 − plus NO 3 − ), suitable for a variety of aquatic environments. The sensor uses the phosphomolybdate blue method for PO 4 3− , the silicomolybdate blue method for H 4 SiO 4 and the Griess reagent method for NO 2 − , modified with vanadium chloride as reducing agent for the determination of NO 3 − . Here, we report the optimization of analytical conditions, including reaction time for PO 4 3− analysis, complexation time for H 4 SiO 4 analysis, and analyte to reagent ratio for NO 3 − analysis. The instrument showed wide linear ranges, from 0.2 to 100 μM PO 4 3− , between 0.2 and 100 μM H 4 SiO 4 , from 0.5 to 100 μM NO 3 − , and between 0.4 and 100 μM NO 2 − , with detection limits of 0.18 μM, 0.15 μM, 0.45 μM, and 0.35 μM for PO 4 3− , H 4 SiO 4 , NO 3 − , and NO 2 − , respectively. The analyzer showed good precision with a relative standard deviation of 8.9% for PO 4 3− , 4.8% for H 4 SiO 4 , and 7.4% for NO 2 − plus NO 3 − during routine analysis of certified reference materials (KANSO, Japan). The analyzer performed well in the field during a 46-day deployment on a pontoon in the Kiel Fjord (located in the southwestern Baltic Sea), with a water supply from a depth of 1 m. The system successfully collected 443, 440, and 409 on-site data points for PO 4 3− , Σ(NO 3 − + NO 2 − ), and H 4 SiO 4 , respectively. Time series data agreed well with data obtained from the analysis of discretely collected samples using standard reference laboratory procedures and showed clear correlations with key hydrographic parameters throughout the ...
– Name: TypeDocument
  Label: Document Type
  Group: TypDoc
  Data: article in journal/newspaper
– Name: Language
  Label: Language
  Group: Lang
  Data: English
– Name: NoteTitleSource
  Label: Relation
  Group: SrcInfo
  Data: https://www.mdpi.com/1424-8220/22/9/3479; https://doaj.org/toc/1424-8220; https://doaj.org/article/5f31276d9f5643ba8b9bc30b7477f84b
– Name: DOI
  Label: DOI
  Group: ID
  Data: 10.3390/s22093479
– Name: URL
  Label: Availability
  Group: URL
  Data: https://doi.org/10.3390/s22093479<br />https://doaj.org/article/5f31276d9f5643ba8b9bc30b7477f84b
– Name: AN
  Label: Accession Number
  Group: ID
  Data: edsbas.4AF45FEC
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=edsbas&AN=edsbas.4AF45FEC
RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.3390/s22093479
    Languages:
      – Text: English
    Subjects:
      – SubjectFull: Griess reagent
        Type: general
      – SubjectFull: nutrients analysis
        Type: general
      – SubjectFull: Kiel Fjord
        Type: general
      – SubjectFull: posphomolybdenum blue method
        Type: general
      – SubjectFull: silicomolybdenum blue method
        Type: general
      – SubjectFull: vanadium chloride reduction
        Type: general
      – SubjectFull: Chemical technology
        Type: general
      – SubjectFull: TP1-1185
        Type: general
    Titles:
      – TitleFull: Improvement of On-Site Sensor for Simultaneous Determination of Phosphate, Silicic Acid, Nitrate plus Nitrite in Seawater
        Type: main
  BibRelationships:
    HasContributorRelationships:
      – PersonEntity:
          Name:
            NameFull: Mahmoud Fatehy Altahan
      – PersonEntity:
          Name:
            NameFull: Mario Esposito
      – PersonEntity:
          Name:
            NameFull: Eric P. Achterberg
    IsPartOfRelationships:
      – BibEntity:
          Dates:
            – D: 01
              M: 01
              Type: published
              Y: 2022
          Identifiers:
            – Type: issn-locals
              Value: edsbas
            – Type: issn-locals
              Value: edsbas.oa
          Titles:
            – TitleFull: Sensors, Vol 22, Iss 3479, p 3479 (2022
              Type: main
ResultId 1